/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.command.dev;
import gnu.classpath.jdwp.transport.JNodeSocketTransport;
import gnu.classpath.jdwp.Jdwp;
import java.io.PrintWriter;
import java.io.Reader;
import org.jnode.shell.AbstractCommand;
import org.jnode.shell.syntax.Argument;
import org.jnode.shell.syntax.IntegerArgument;
/**
* Starts up a JDWP remote debugger listener for this JNode instance.
*
* @author Levente S\u00e1ntha
*/
public class DebugCommand extends AbstractCommand {
private static final String help_port = "the port to listen to";
private static final String help_super = "Listen to connections from a remote debugger";
private static final String str_quit = "Type 'q' to exit";
private static final int DEFAULT_PORT = 6789;
private final IntegerArgument argPort;
private boolean up = true;
public DebugCommand() {
super(help_super);
argPort = new IntegerArgument("port", Argument.OPTIONAL, help_port);
registerArguments(argPort);
}
public static void main(String[] args) throws Exception {
new DebugCommand().execute(args);
}
@Override
public void execute() throws Exception {
int port = argPort.isSet() ? argPort.getValue() : DEFAULT_PORT;
// FIXME - in the even of internal exceptions, JDWP writes to System.out.
final String ps = "transport=dt_socket,suspend=n,address=" + port + ",server=y";
Thread t = new Thread(new Runnable() {
public void run() {
while (up()) {
Jdwp jdwp = new Jdwp();
jdwp.configure(ps);
jdwp.run();
jdwp.waitToFinish();
jdwp.shutdown();
}
// workaround for the restricted capabilities of JDWP support in GNU Classpath.
JNodeSocketTransport.ServerSocketHolder.close();
}
});
t.start();
Reader in = getInput().getReader();
PrintWriter out = getOutput().getPrintWriter();
while (in.read() != 'q') {
out.println(str_quit);
}
// FIXME - this just stops the 'debug' command. The listener will keep running
// until the remote debugger disconnects. We should have a way to disconnect at
// this end.
down();
}
public synchronized boolean up() {
return up;
}
public synchronized void down() {
up = false;
}
}